Hey bud if you're trying to join the forum with a hotmail account or similar (i.e an anonymous account) the RSOC forum wont allow you to - its something to do with spam filters and that to register you have to have a valid non anonymous email to send your log in details to, etc. Email address such as aol, virgin, bt internet are all fine as they are part of your online internet subscription and non anonymous

Try registering using your works email or get a mate to do it for you